64 On the Phosphoric Strata of the Chalk Formation. 
green-sand alonp: the escarpment of the clialk ranges, with which it is 
highly probxhle that tlie zone of pliosplioric marl is cn-existent. In the 
tirst-mentioned range, the following places may be particularised, in the 
vicinity of which it is likely to be found : commencing with Flam- 
borough Head, Bridlington, Beverley, and Kitigston-upon-Hull, in York- 
shire ; narton, Hrigg, Spilsby, Wainfleet, in Lincolnshire ; Hunstanton, 
Snettisham, Middleton, Narborough, Downham, in Norfolk ; Brandon, 
Mildenhall, Upware, SwaflTham Prior, in Suffolk ; the neighbourhood of 
Cambridge, and thence to B;ildock, Ilitchin, Tring, in Hertfordshire; 
Woburn, Dunstable, in Bedfordshire; Wendover, Tetsworth, in Buck- 
inghamshire ; Abingdon, Wantage, Farringdon, in Berkshire ; Swin- 
don, Calne, Devizes, the vale of Pewsey, Westbury, Warminster, the 
vale of Wardour, in Wiltshire; Shaftesbury, Sutton- Waldron, Mintern, 
the neighbourhood of Dorchester, and Bridport, in Dorsetshire. 
In the second range, beginnning at Folkstone, skirting the escarpment 
of the North Downs toLenham, Hollingbourne, the north of Maidstone, 
Wrotham, and the vale of Holmsdale, in Kent; Gudstone, Merstham, 
Buckland, Dorking, Shalford, Guildford, Puttenham, Seal. Farnham, in 
Surrey; Bentley, Froyle, Worldbam, Selborne, Hawkley, Steep, Pe.ers- 
fieli, in Hampshire ; Harting, Elstead, Nursted, Barlavington, Sutton, 
Bignor, Amberley, Bury, Sulhngton, Steyning, Lewes, East Bourne, and 
South Bourne, in Sussex. 
In the third, or Isle of Wight, from Culver Cliff to the south of and 
parallel with Benibridge, Ashy, Aieton, Chillerton, Mottestone, and 
Shalcombe Downs, to Compton Bay ; and on the S. K. coast, at the top 
of the UnderclifF, following the inland talus of Shanklin, Bonitace, and 
St. Catherine's Downs. 
It is needless to point out the localities of the gault and lower green - 
sand formations, as they occupy a zone, varying greatly in breadth, 
parallel to the strata of the upper green-sand at the foot of the chalk- 
hills. 
For the purpose of reference Dr. Fitton's admirable paper ' On the 
Strata below the Chalk,' published in the 2nd part of vol. iv. of the 
Second Series of the Transactions of the Geological Society, and also 
his subsequent paper on the Lower Green-Sand, published in vol. iii. of 
the Quarterly Journal of this Society, may be consulted with great advan- 
tage. The remarKable nodules containnig the phosphate o! lime seem 
to have specially attracted his attention many years ago. 
Before entering upon the observations and examinations which 
have recently been purposely made in reference to the present 
subject, it may be desirable to recite what has incidentally been 
observed in reference to or bearing upon it in former publications, 
commencing with the strata of the upper green-sand. 
In the ' Outline? of the Geology of England and Wales,' by Cony- 
heare and Phillips, published in 1822, they state, p. 163, tha't "The 
indurated chalk marl is extensively quarried at Totternhoe, in Bedford- 
shire, and Reach, in Cambridgeshire. It is there known by the name of 
clunch Reniform masses of radiated pyrites are common, 
and one singular bed is full of similar masses of jellow indurated marl, 
